PART – ANote : i) Answer all the 10 questions.ii) Questions have to be answered in one word or in onesentence each. Each question carries one mark. 10 × 1 = 10

1. What is the role of limestone in the extraction of iron from haematite ?2. Hydrogen sulphide gas cannot be dried using conc. H 2 SO 4 . Give reason.3. Which one among Cu + 1 and Cu 2 + salts is coloured ?4. What is the limiting value of degree of dissociation of an electrolyte at infinite dilution ?5. Sea-water freezes below 273 K. Why ?Code No. 34 106. Define electrophoresis.7. The coordination number of a crystal is 6. What is the geometry of the crystal ?8. Name the gas liberated when bromoethane is heated with alcoholic potash.9. Phenol does not react with sodium bicarbonate. Why ?10. Name the protein present in hair.

11. Draw Ellingham diagram for the formation of oxides of aluminium and magnesium. Which one of these metals acts as better reducing agentabove 1500°C ?12. How does potassium dichromate solution react with potassiumhydroxide ?13. Calculate the EAN value of the central metal ion in tetramine copper (II) sulphate.14. Sketch the shapes of bonding and antibonding molecular orbitals formedwhen two S orbitals undergo LCAO.15. A first order reaction is 50% completed in 80 min. Calculate the rate constant of the reaction.16. Mention any two characteristics of an ideal solution.17. pH value of a sample of mango juice is 4·54. Calculate the [ H + ].18. Identify A, B, C and D in the following equation :CH 3 – CH 2 – Cl A → CH 3 – CH 2 – OH B→ CH 3 – COOH NaOH → C NaOH + CaO heat → D .19. What is Wurtz-Fittig reaction ? Write the general equation.20. Write the equations for the following reactions :i) Dry distillation of calcium acetateii) Reaction of phosphorous pentachloride with acetic acid.21. Write the Haworth structure of α – D – maltose.22. What happens when tristearin is heated with potassium hydroxidesolution ? Give the equation.

PART – C

I. Answer any two of the following questions : 2 × 5 = 10

23. a) Describe the manufacture of ammonia by Haber's process. 3b) Sketch the shapes of nickel tetracarbonyl. Which type ofhybridisation is involved in the formation of this compound ? 224. a) How is a mixture of noble gases separated by Dewar's charcoalmethod ? 3b) Write the electronic configuration of lithium molecule. Commenton its magnetic property with reason. 2Code No. 34 1225. a) State any three postulates of Werner's theory of co-ordinationcompounds. 3b) On the basis of electron gas theory, explain bright lustre ofmetals. 2

II. Answer any three of the following questions : 3 × 5 = 15

26. a) What is mesomeric effect ? What type of mesomeric effect isshown by – CHO group in benzaldehyde ? 2b) Explain the mechanism of nitration of benzene. 327. a) How is phenol isolated from coal tar ? 3b) What is a dipeptide ? How many peptide linkages are present ina tetrapeptide ? 228. a) What is optical activity ? Which one of the following compoundsshows optical isomerism ? 2Br — C — BrHCH3Br — C — COOHOHCH3b) How is ethyl bromide converted into ethyl isocyanide ? Write theequation. 2c) Give a chemical reaction to show that a molecule of glucosecontains a carbonyl group. 113 Code No. 3429. a) Calculate angle strain in cyclobutane. 2b) Explain carbylamine reaction for a primary amine. Write generalequation. 2c) One mole of a given amine consumes two moles of methyl iodidefor exhaustive methylation. What type of amine is this ? 1

35. a) Describe Parke's process for the desilverisation of Argentiferrous lead. 3b) Why are transition elements and their compounds goodcatalysts ? Explain. 2c) For a reaction, the graph of rate of the reaction against molarconcentration of the reactant is a straight line parallel to theconcentration axis. What is the order of this reaction ? Give anexample for such a reaction. 215 Code No. 34d) The value of standard free energy of formation of ammonia at298 K is – 16·6 kJ mol– 1 . Calculate the equilibrium constantK p for the reaction. 2e) What is iodine value ? 136. a) Give the mechanism of Cannizzaro's reaction. 3b) A current of dry air was passed through a solution containing5·4 g of an aromatic compound in 61·2 g of diethyl ether andthen through the solvent. The loss in mass of solution bulb was0·708 g and that in the solvent bulb was 0·035 g. Calculate themolecular weight of the aromatic compound.( Given molecular weight of diethyl ether = 74 ) 2c) When NH 4 Cl and NH 4 OH are added to a solution containingAl3 + and Zn 2 + ions, only Al ( OH ) ,3 precipitates. Give reason. 2d) i) Write the IUPAC name ofCH 3 — CH — CH 2 — COOHCl ii) Out of CH 3 — CH — CH 2 — COOH Cl and CH 3 — CH 2 — CH — COOH Clwhich one has higher pKa value ? 2e) How many Lattice points are present in a unit cell of CsCl ? 1Code No. 34 16D 2

V. Answer any two of the following : 2 × 5 = 10

37. a) How is m-nitrobenzene prepared in the laboratory fromnitrobenzene ? Write the equation. 3b) Mention a general test fori) Proteinii) Carbohydrate. 238. Describe an experiment to show that acid hydrolysis of methylacetate follows first order kinetics. 539. For the estimation of potassium permanganate ( KMnO 4 ) usingstandard ferrous ammonium sulphate —i) Write the chemical equation for the reaction involved.ii) Give the equivalent weight of potassium permanganate.iii) Name the indicator used.iv) What is the colour change at the end point ?v) Write the equation for calculating mass / dm 3 of potassiumpermanganate in a given solution from its normality. 5

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